An IM2-free floating current buffer using average power based automatic calibration for IEEE 802.15.6 transmitter

Yang Liu, Yintang Yang, Di Li, Zuochen Shi
2016 IEICE Electronics Express  
To meet the stringent spectral mask requirement of IEEE 802.15.6, a novel spectral shaping buffer and a new automatic calibration are proposed in this paper. By introducing a floating current into buffer, second order intermodulation product (IM2) is cancelled at output. To calibrate buffer, analog signal processing methods for average power extraction of residual IM2 and accurate quantization are presented, along with error-tolerant decision making logic. A sample human body communication
more » ... communication (HBC) transmitter is implemented in 0.13 μm CMOS process. Simulation results show spectral mask is suppressed below -120 dBr, satisfying the IEEE 802.15.6 standard specification.
doi:10.1587/elex.13.20160636 fatcat:qyzphyywmvfi7jewkh2uec6wnq